It stated that ICE can curb the "proactive procedures" put in place to obtain a warrant, since they "will not always be realistic or effective in swiftly identifying and removing alien enemies."

"Given the dynamic nature of enforcement operations, officers in the field are authorized to apprehend aliens upon a reasonable belief that the alien meets all four requirements to be validated as an alien enemy," it read.

It added: "This authority includes entering an alien enemy's residence to make an [Aliens Enemies Act] apprehension where circumstances render it impracticable to first obtain a signed notice and warrant of apprehension and removal."